Pumpkin Seeds, Pepitas, and Squash

A pumpkin seed is the edible seed of a pumpkin or certain squash cultivars, and the term can refer to either the whole unhulled seed or the hulled kernel. The word pepita comes from a Mexican Spanish phrase meaning little seed of squash, and in the United States the hulled kernel is usually sold under that name, often roasted and salted.

Ten Thousand Years of Cultivation

Pumpkins and squash belong to the genus Cucurbita, and archaeological work dates the initial domestication of Cucurbita pepo to about 10,000 years ago in the Americas. Squash was the first crop domesticated in Mesoamerica and later became one of the Three Sisters, grown alongside maize and beans.

The seed remains a staple of Mexican cooking. It is an ingredient in the mole-style dishes known as pipián, and a salsa of ground pumpkin seeds called sikil pak is a traditional dish of the Yucatán. In Greece, lightly roasted, salted, unhulled seeds are a popular snack. In Central Europe, the Styrian oil pumpkin has a long record: the Austrian agriculture ministry cites the apparent first documented mention of pumpkin seed oil in Styria from around 1739, and notes that local farmers discovered a soft-shelled mutant in 1880 and brought it into cultivation.

Seeds also had a medical past. They were once used to expel tapeworms and appeared in the United States Pharmacopoeia as an antiparasitic from 1863 until 1936.

In the bulk trade, pumpkin seeds are bought and sold by type, and the type shapes the processing steps and the end use. Nutrada, a European B2B sourcing marketplace, describes four dominant types: GWS (short for grown without shell), Shine Skin, Snow White, and Lady Nail. These are trade descriptions rather than formal standards, so treat them as a starting point for a specification.

How the Hull-Less Trait Arose

Hull-less pumpkins are a natural mutation. The Austrian agriculture ministry explains that in the Styrian oil pumpkin, a natural mutation left the outer layers of the seed coat soft rather than woody, so the seeds need no shelling. Some other cultivars are also huskless and grown only for their edible seed.

A Note on Substitution

Sources in this trade do not fully agree on whether GWS and hulled Shine Skin kernels can be swapped. Nutrada’s overview says the two are often interchangeable in food formulations, mainly differing in color, while its supplier database says GWS and Shine Skin come from different species and cannot be substituted for one another. The practical lesson is to specify type, grade, size, and color explicitly, and to check actual specifications, since Nutrada also cautions that an AA grade from one processor may not match an AA from another.

Growing Conditions

Pumpkins are a warm-season, frost-sensitive crop. Tridge’s commodity profile notes that they need adequate pollination, that yield and seed fill are sensitive to water stress during flowering and fruit set, and that well-drained soils and field hygiene reduce disease pressure. Oregon State University extension researchers state that pumpkins grow best in soils with a pH of 6.5 to 7.5, and time to maturity commonly runs three to five months depending on cultivar and climate.

Pests, Disease, and Rotation

The same Oregon State report lists fusarium, powdery mildew, and squash bugs among the pest issues and says rotations should leave four to five years between pumpkin crops to reduce disease pressure. In their trial, squash bugs were a significant threat, and they noted that a reliable treatment program meeting organic standards would be needed for squash bug control.

Seed Share of the Fruit

How much seed a pumpkin carries varies widely by cultivar. In the Oregon trial, dried seed made up about 1.7 to 1.9 percent of fruit weight in large-fruited cultivars such as Kakai and the standard Styrian. Smaller-fruited cultivars carried far more, including 4.7 percent in Naked Bear and 6.4 percent in the line NH2026R. This was a single-year trial, and because the stand failed (see below), the researchers reported seed as a share of fruit weight rather than reliable yield data.

Much of a pumpkin seed’s quality is set after harvest. In the United States, Tridge notes that the fall harvest aligns with Halloween and processing-pumpkin season and that seed availability depends on extraction and drying throughput, not only on the crop itself.

From Pumpkin to Packed Seed

• Extraction to grading: The standard value chain runs from harvest to seed extraction, washing, drying, cleaning and sieving, and grading, followed by optional hulling, roasting, and seasoning before packaging.
• Speed matters: Oregon State researchers noted that seed may need to be washed and dried within four hours of harvest to avoid sticking together, and that seed is not considered marketable once it congeals.
• Drying target: In the Styrian system, seeds are washed and dried immediately after harvest until water content reaches 6 to 8 percent.
• Grading: Buyers typically assess moisture, cleanliness, kernel color and size uniformity, broken or defective kernels, and insect damage. Grades are usually buyer-defined, though kernels are commonly sorted into AA, A, and B tiers.

Storage, Safety, and Shelf Life

Because pumpkin seed is rich in oil, shelf life depends on controlling moisture and oxygen. Tridge identifies mycotoxin contamination, notably aflatoxin, as the biggest global trade risk, since it can cause border rejections and recalls, particularly when drying and storage are inadequate or lots are commingled without strong traceability. It rates oxidative rancidity as a further quality risk in warm or oxygen-exposed conditions, and notes that kernels are commonly packed in vacuum or nitrogen-flushed packaging and stored cool and dry.

Styrian Pumpkin Seed Oil

The best-known pumpkin seed oil comes from Styria, Austria, and is pressed from the hull-less seeds of Cucurbita pepo var. styriaca. According to the Austrian agriculture ministry, the seeds are finely ground, mixed with water and salt, kneaded, gently roasted, and mechanically pressed without refining, and it takes 2.5 to 3 kilograms of seed to make one liter. The EU recognized Styrian pumpkin seed oil as a protected geographical indication in 1996. The oil must be 100 percent pure pumpkin seed oil from the first pressing, pressed only in defined districts of Styria and southern Burgenland, and the ministry describes it as deep green with an intense, nutty taste.

The ministry describes the oil as high in polyunsaturated fatty acids, especially linoleic acid. Across pumpkin seeds generally, linoleic and oleic acid are the major fatty acids.

Kernels, Press Cake, Butter, Flour, and Protein

Beyond oil, pumpkin seeds move through several other channels. Nutrada reports that roasted, salted Shine Skin is frequently private-labeled for snack retail, while GWS kernels are more commonly supplied in bulk for food manufacturing. Tridge lists kernel use as toppings and inclusions in breads, granola, and confectionery. Oil pressing leaves a press cake, which the Austrian ministry says is often used as feed for cattle and pigs and is gaining popularity in human nutrition. Seeds can also be made into nut butter, and Nutrada lists defatted GWS flour as a protein ingredient at 50 to 60 percent protein.

One market research report projects that the global pumpkin seeds market will reach USD 1.56 billion in 2026 and USD 2.36 billion by 2032, a compound annual growth rate of 7.17 percent. Market size estimates vary by research firm and methodology, so treat any single figure as indicative.

Origins and Seasonality

The same report describes China as central to production, processing, and export flows, and Nutrada calls it the dominant supplier of GWS hulled kernels, accounting for the majority of global bulk volume. Tridge also cites China as a frequently named leading origin, while advising readers to verify current rankings in trade statistics. Ukraine is the main European-facing source of Shine Skin and Snow White, and Austria holds a premium position in hull-less Styrian-type seed.

Pumpkin seed is a once-a-year crop. Tridge’s supply calendar shows September through November harvests in China and the United States, August through October in Ukraine, and September to October in Austria’s Styrian segment, with Argentina’s March-to-May harvest available as a counter-seasonal complement for year-round sourcing programs.

Price Signals

Public price data for pumpkin seeds is noisy and should be read with caution. Tridge’s tracker recorded supplier transactions in China at roughly $2.83 to $3.15 per kilogram from November 2025 through March 2026, while wholesale listings in Italy stood near $9.59 to $9.79 and in Poland between about $3.83 and $5.15. Other entries on the same tracker were far lower or higher, and the figures mix different forms, grades, and reporting methods, so they show how wide the spread can be rather than a reliable benchmark. Current quotes against a clear specification remain the only dependable guide.

Where Demand Is Headed

Tridge lists the main demand drivers as snack seeds and private-label retail programs, bakery and food manufacturing use, and pumpkin seed oil. Oregon State researchers also point to ready-to-eat snacks as an emerging market. Outlooks differ: the market report above forecasts steady growth, while Tridge describes the medium-term outlook as mixed, because demand growth in snack and ingredient uses can be offset by price sensitivity and substitution with other edible seeds and nuts.

According to USDA data for dried pumpkin and squash seed kernels, 100 grams provide about 30 grams of protein, 49 grams of fat, and 6 grams of fiber, along with notable amounts of magnesium, zinc, iron, phosphorus, and manganese. The seeds are also energy-dense, at 559 calories per 100 grams.

Magnesium, Zinc, and Fats

Magnesium is a cofactor in more than 300 enzyme systems that support functions including protein synthesis, muscle and nerve function, blood glucose control, and blood pressure regulation, according to the NIH Office of Dietary Supplements. A one-ounce serving of dried kernels supplies roughly 152 mg of magnesium and 2.1 mg of zinc, which works out to about 36 percent and 19 percent of the Daily Values. Most of the fat is unsaturated, with linoleic and oleic acid as the major fatty acids.

What the Research Says

A 2022 review in the journal Plants covers pumpkin flesh, seeds, and peel, and reports antioxidant, anti-inflammatory, and other activities, but it draws heavily on animal and laboratory studies and concludes that further research is still required. Human trial evidence is thinner. In a single-blind randomized trial of 73 men with benign prostatic hyperplasia, pumpkin seed oil relieved symptoms without side effects but was less effective than the drug tamsulosin, and the trial compared the oil with the drug rather than with a placebo. Healthline also summarizes a 2014 trial in which men with hair loss who took the oil showed more hair growth than those on placebo. These findings are best treated as areas of ongoing research, not established health claims, and this guide is not medical advice.

Allergy and Safety Considerations

Allergy to pumpkin seed has long been described as rare, but clinicians now call it an emerging allergen that can cause severe reactions, including anaphylaxis, and that frequently overlaps with sensitivity to sesame and sunflower seeds. Brands should handle labeling and allergen controls accordingly. Pumpkin seeds are also calorie-dense, so portion size matters in product positioning.